Reports that Jon Gosselin is looking for an apartment in New York City only added to the rumors that he and his wife, Kate, are splitting up as their reality show, "Jon & Kate Plus 8," promotes a big announcement coming Monday.

The Gawker, a New York City gossip site, reported Friday that Jon Gosselin was scoping out a one-bedroom, $3,200-a-month apartment on Manhattan's West Side.

People quoted an unnamed source as saying that he had "been going back and forth to New York a lot." Gosselin returned home to Wernersville, Pa., on Friday, People reported.

The TLC network has said only that the couple will announce a major decision on Monday's episode of the show, which features their 8-year-old twins and 5-year-old sextuplets. The show is scheduled to air at 9 p.m. EDT.

In a promotional video posted by TLC hyping the special one-hour edition, Kate Gosselin says, "Recently, we've made some life-changing decisions ... ones that we hope will bring each of us some peace."

Peace seems to have been in short supply for the Gosselins of late. Splashed across Web sites and magazine covers in recent weeks are accounts of infidelity by both spouses -- Jon with a 23-year-old schoolteacher and Kate with her bodyguard -- accusations both of them deny.

Meanwhile, their on-screen relationship has been arms-length at best.

PHOTOS: Click here to see photos of the Gosselin family.

"Very swiftly we turned into two different people," Kate said on the fifth-season premiere last month, which attracted nearly 10 million viewers. Subsequent episodes have had less than half that viewership.

She described how she has grown apart from her husband of 10 years, saying, "it's just hard."

Adding to the strain, Pennsylvania's Labor Department has opened an investigation into whether the show's production is complying with state child labor laws. TLC has said it "fully complies" with state laws and regulations.

The Associated Press contributed to this report.